PROBLEM TO BE SOLVED: To highly accurately discriminate a target state in various environments from an event relating to the target without a loss of privacy protection.SOLUTION: A positioning device comprises a state detection unit 5 that, of coverage areas of a plurality of P pieces of FMCW radars 1to 1, identifies a location of a monitored person 10 serving a target as a point or area respectively apart from locations Lto Lof the plurality of P pieces of FMCW radars 1to 1over distances dto dindividually measured by the plurality of P pieces of FMCW radars 1to 1for the monitored person 10 as the target located in a common area.SELECTED DRAWING: Figure 1
